Reference numberCLP/20/35/2
Alternative reference numberCLP/20/35 p2
TitleDiagram, A new way for sounding the depth of the sea without a line by Robert Hooke
Date30 September 1663
DescriptionDiagram illustrating Robert Hooke's invention for sounding the sea without a long line, using instead a ball sunk to the bottom of the sea by a weight which is released as soon as it touches the sea-floor and returns to the surface.

Text next to diagram reads: 'Between the long wire-staple B of the Ball A I press in with my fingers a springing wire C, on the bended end F of which, I hang the weight D, by its ring E, and so let them down into the water in this posture, towards the bottom of which they are carried with a considerable swiftnes, which the weight D touching first, is thereby stopt, but the Ball, by the impetus, it acquired in descending, being carried downwards, a little after the other is stopt, suffers the springing wire C to fly back and thereby sets itself at liberty to reascend.'

The design was discussed at the meeting of the Royal Society on 30 September 1663.

Subject: Oceanography
Physical descriptionInk on paper
Access statusOpen
Related materialDOI: 10.1098/rstl.1666.0009
Diagram printed in the Philosophical Transactions of the Royal Society (1666)
Related records in the catalogueCLP/20/35/3
Fellows associated with this archive
NA8242Hooke; Robert (1635 - 1703); natural philosopher1635 - 1703
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